Water heater



Nov. 26, 1935.

T. PARMELEE WATER HEATER 3 Sheets-Sheet 1 Filed Feb. 18, 1955 Nav. 26, 1935. T PARME'LEE 2,022,431

WATER HEATER Filed Feb. 1,8, 1955 3 Sheets-.Sheet 2 T. PARMELEE Nov. 26, 1935.

WATER HEATER Filed Feb. 18, 1935 5 Sheens-SheeiI 3 www Patented Nov. 26, 1935 UNITED STATES PATENT `OFFICE 5 Claims.

The `present invention relates to `water heaters to be used in connection with the supply of hot watertostoragetanks, heating systemsand the like in which the heat contained in the products 5 of combustion arising from a stove, furnace or other heater may be utilized or exchanged instead of being permitted to escape through the chimney or ue forsuch heaters and be totally wasted. Y

l One of the principal objects of the invention is to provide a Water heater comprising a casing which will confine the hot gases from a heater andplace within such conned area water conducting coils and such coils being so positioned 15 and arranged as to utilize their maximum heating surfaces Without materially r`-retarding the passage of the unburnt fuel particles or smoke through such casing. k

A still further'object-of the invention is topro- 20 vide a water heater of the aforesaid character which may be permitted to be used as a section of a conventional smoke flue wherebyv it may be easily and readily installed by only removing one of the sections of the smoke flue vandsubstituting the water heater therefor and one in which access may be conveniently gained when installed, for cleaning the soot or other foreign matter that accumulates therein, whereby the standards of eniciency of the heater may be 30 maintained.

And still a further object of the invention is to provide ya water heater of the character herein set forth comprising a plurality of separate and individually connected Water conducting coils 35 which may be readily and conveniently removed and new coils substituted therefor lshould any one coil leak o-r become broken.

Otherlob'jects of the invention will be in part obvious and in part pointed out hereinafter. 40 In order that the `invention and `its mode of operation may be readily understood lby persons skilled in the art, I have in the accompanying illustrative drawings and in the detailed following description based thereupon, set out an embodiment of the same.

In these drawings:

Figure lV is a plan view of my improved water heater when applied to a smoke flue and having a portion of the casing thereof broken away to show the interior thereof; l

Figure 2 is a side elevation of the water heater embodying the invention when removed from the smoke flue and having a section vof its casing 55. broken away;

Figure 3 is an end elevation of my improved Water heater;

Figure 4 is a vertical transverse section taken on the line 4-'4 of Figure 1 in the direction of the 'arrow'points;

Figure 5 is a detail plan View of the casing of the Water heater showing one end of one of the Water coils projecting through an opening within thecasing;

Figure 6 is a detail sideelevation of the cou- 10 plings employed between the water coils and the manifolds thereof, the latter being shown in section;

Figure 7 is a .detail sectional view `of a slightly modified form of a connection between the casing of the water heater and one of thewater manifolds;

Figure 8 is a horizontal sectional viewv through a Water heater embodying a slightly modified form of the invention, and

Figure 9 is a plan View of one of the sealing clamps.

Referring now more particularly to the accompanying drawings wherein like and corresponding parts are designated by similar reference characters throughout the several views, I have herein shown and indicated by the numeral l a portion of the heater having the smoke ue 2 extending therefrom. The smoke flue may be of any oonventional type or when made into sections, the various sections are so connected that the hot products of combustion arising from the fire box of the heater may travel through the smoke flue into a chimney. When applying my improved water heater to such smoke flues, one section thereof may be removed and my heater substituted therefor having one end connected to the section 2 of the smoke flue and its opposite end connected to the section 3 thereof. The water heater embodyingy the present invention comprises a casing 4 of a preferably rectangular configuration having a circular extension 5 projecting from one of the side Walls near one end thereof and adapted to fit over the section 2 of the smoke flue extending from the heater I. The other end of this casing 4 tapers as at 6 to a circular extension 1 and the latter is capable of fitting within one end of the section 3 of the smoke flue. The opposite end of the casing 4 has an opening whereby access may be readily gained to the interior of the casing for cleaning the soot or other foreign matter that may accumulate therein. This opening is normally kept closed by a sliding door 8. This door slides within the guideways 9 formed within the casing and is provided with a handle IB whereby the door may be raised in gaining access to the interior of the casing 4. Connected to a water storage or hot Water heating system is the usual supply pipe II and the return pipe I2. Connected to the ends of these pipes Il and I2 by means of the couplings I3 are manifolds I4. Each manifold I4 has one end closed by means of the cap I5 and has formed therein a plurality of threaded openings. Seated Within each threaded opening of these manifolds is a nipple it having a hexangular gripping surface formed therewith whereby a suitable wrench may be connected thereto for connecting or disconnecting these nipples from the threaded openings formed within the manifolds I4. Each nipple is provided with a threaded extension I1 having a bevelled and ground tapered surface I8.

Adapted to be positioned within the casing 4 are a plurality of coils preferably made of copper and those indicated by the numerals I9 are of greater diameter than those indicated by the numerals 23. Each coil is arranged in a vertical position within the casing 4 and the larger coils I9 are arranged to one side of the center of the casing whereas the smaller coils 20 are alternately arranged between the larger coils and at the opposite side of thec'enter line extending through the casing. The opposite ends of each coil extend in extensions 2| which latter terminate in flared anges or projections 22 adapted to rit over the bevelled portions I8 of the nipples I S thereby forming a ground joint between the coils and such nipples. Loosely mounted upon each extended end 2l of these coils is a nut 23 which latter is adapted to have engagement with the threaded ends I1 of its nipple I6 thereby providing not only a tight joint between the extended ends of the coils and the nipples but effecting a detachable connection whereby the coils may be readily connected to or detached from their respective manifolds. 'I'he side walls of this casing 4 are provided with openings 24 of a diameter greater than that of the nuts 23 whereby the extended ends 2| of the coils and the nuts 23 carried thereby may be passed through these openings 24 when being connected to the manifolds I4 or they may be drawn within the casing through such openings 24 when removing a coil therefr-om. In order to close these openings 24 and prevent the smoke or heat escaping therethrough, I provide sealing clamps 25. 'I'hese clamps each consist of two hingedly connected sections adapted to t over the extended end 2| of the coils and have a diameter larger than that of the openings 24 whereby when such sealing clamps are applied, the openings 24 will be completely closed and the heat or smoke prevented from escaping therethrough.

In Figure 7 of the drawings, I have illustrated a slightly modied form of connection between the manifold I4 and the eXtende-d ends of the water coils thereby eliminating the use of the sealing clamps 25 and permitting a suitable insulated covering to be applied. In this form of my invention, I arrange within the casing 4 and completely cover the various walls thereof with a suitable insulating material such as asbestos 25. This insulating material is provided with openings 2l alining with the openings 24 formed within the casing 4 .so that the extended ends 2| of the water coils may project therethrough. A suitable covering 28 made of insulating material may extend over the manifolds I4 and the extended ends 2I of the water coils thereby not only preventing the heat or smoke from escaping but insulating the water being supplied to or from the heater from the surrounding temperatures.

In the slightly modified form of the invention as disclosed in Figure 8 of the drawings, I have shown a water heater comprising a casing 30 having the opposite ends thereof normally closed by means of the sliding doors 3|. Communicating with this casing is an inlet pipe 32 which is adapted to have connection with the stove pipe of the furnace to which it is connected, and the opposite wall of this casing is provided with an outlet pipe 33 which latter is adapted to have connection with the chimney. 'I'he water coils 34 are arranged in groups within the opposite ends of the casing 3B and positioned within the casing is a balile plate 35 whereby the hot gases arising from the furnace will enter the casing 30 through the inlet pipe 32 and by striking the baille 35, will be directed to the opposite ends of the casing 36. after circulating by the water coils 34 will then be caused to flow through the outlet opening 33 and exhaust through the chimney to which the heater is connected.

From the foregoing, it is obvious that I have provided a water heater which may be easily and readily applied to the smoke flue of a stove, furnace or other heater and the heat which is usually permitted to escape through the chimney is utilized for heating water and this water may be supplied to a storage tank or ordinary heating. system thereby economizing on the use of fuel. Furthermore, it is apparent that, through the construction and arrangement of the various parts herein set forth, not only a greater part of the waste heat from the heater may be utilized but the various parts of my heater may be dismantled when required in order that new parts may be readily substituted therefor for increasing the life of the water heater and thereby rendering the same commercially desirable.

Manifestly, the construction herein shown is capable of considerable modification and such modifications as come within the scope of my claims, I consider within the spirit of my invention.

I claim:-

1. A water heater comprising a casing adapted to form one section of a iue and to be connected to the chimney of a heater whereby the hot gases arising from the heater may pass therethrough, a plurality of coils positioned within said casing, said coils comprising two groups of different diameters, said group of coils of the smaller diameter being alternately arranged between the coils having the greater diameter, a Water inlet, a Water outlet, and means for connecting each of said coils to said water inlet and outlet.

2. A water heater comprising a rectangular hollow casing, a hot gas inlet connected to one of the side walls of said casing and communicating with the interior thereof, a reduced circular extension formed at one end of said casing and providing an outlet therefor, a closure controlled opening formed within the opposite end of said casing, a plurality of coils arranged within said casing, a water inlet, a water outlet, and means for connecting said Water inlet and outlet to said coils.

3. A water heater comprising a casing having hot air inlet and outlet openings therein, one end of said casing having an opening, guideways upon said casing and arranged adjacent said opening, a door slidably mounted within said guideways for closing said opening, a plurality These hot gasesof coils arranged Within said casing in a `vertical extended manner, extended ends upon said coils, a manifold arranged externally of said casing adjacent the lower side thereof, a Water inlet communicating with said manifold, a manifold arranged externally of said easing adjacent the upper side thereof, a water 'outlet communieating with the last mentioned manifold, and means for detaohably connecting the extended ends of said coils to said manifolds.

4. A Water heater comprising a casing having inlet and outlet openings for hot gases communieating with the interior thereof, the side Walls of said casing having a plurality of openings formed therein, coils arranged Within said casing, extended ends upon said coils adapted to project through the openings formed within the side Walls of said casing, nuts loosely carried by said extended ends of the coils,said openings Within the side walls of the casing being of a larger diameter than that of the nuts carried by said extended ends whereby the nuts may readily pass therethrough, manifolds arranged externally of said casing, Water inlet and outlet openings communicating With said manifolds, a plurality of nipples mounted upon and communicating with said manifolds, said nuts having detachable connection With said nipples for connecting the extended ends of said coils thereto and a sealing clamp connected to each extended end of said coils for sealing the openings in the side Walls of the casing substantially as and for the purpose specied.

5. A Water heater comprising a casing having oppositely arranged inlet and outlet openings for hot gases communicatingl With the interior thereof, Water coils positioned Within said casing and arranged in groups adjacent the opposite ends thereof, and a balile plate arranged Within said casing Whe-reby the hot gas when entering said casing will be caused to circulate about said coils.

THERON PARMELEE. 

